Refrigerator shows F22; ice buildup on evaporator and poor cooling.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Defective defrost timer logic in control board, Sensor misreading evaporator temperature, Wiring fault in defrost circuit

Safety: Unplug the appliance before accessing the evaporator or control board.

Steps:

Manual defrost: Fully defrost the unit to restore airflow and confirm that cooling returns temporarily.
Check defrost components: Verify heater and sensors as described for other defrost‑related codes (F2/F3).

If all hardware tests good, the control board's defrost algorithm may be faulty. Replacement should be done by a Miele technician.

Hard 4/5

Main Electronic Control Module

Check Price on Amazon

We may earn a commission from links on this page.